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WO2019031132A1 - Steering wheel and manufacturing method therefor - Google Patents

Steering wheel and manufacturing method therefor Download PDF

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Publication number
WO2019031132A1
WO2019031132A1 PCT/JP2018/025868 JP2018025868W WO2019031132A1 WO 2019031132 A1 WO2019031132 A1 WO 2019031132A1 JP 2018025868 W JP2018025868 W JP 2018025868W WO 2019031132 A1 WO2019031132 A1 WO 2019031132A1
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WIPO (PCT)
Prior art keywords
closing member
steering wheel
molded body
resin molded
core metal
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/JP2018/025868
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French (fr)
Japanese (ja)
Inventor
暢ヨン 孫
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Joyson Safety Systems Japan GK
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Joyson Safety Systems Japan GK
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Publication date
Application filed by Joyson Safety Systems Japan GK filed Critical Joyson Safety Systems Japan GK
Publication of WO2019031132A1 publication Critical patent/WO2019031132A1/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/04—Hand wheels
    • B62D1/06—Rims, e.g. with heating means; Rim covers

Definitions

  • the present invention relates to a steering wheel of a car and the like, and a method of manufacturing the same.
  • the present invention relates to a steering wheel having a cored bar and a resin molded body surrounding the cored bar.
  • Patent Literatures 1 and 2 disclose a method of manufacturing a steering wheel having a step of injection-molding a resin around a core metal.
  • the core metal is a circular pipe such as a steel pipe.
  • the metal core is made of a light alloy such as an aluminum alloy or a magnesium alloy and has a U-shaped cross-sectional shape.
  • An object of the present invention is to provide a steering wheel having a good appearance and a method of manufacturing the same.
  • the steering wheel of the present invention is a steering wheel having a wheel portion, and the wheel portion has a core metal and a resin molded body surrounding the core metal, and the core metal is in the circumferential direction of the wheel portion.
  • the recess is closed by a closing member, and the resin molded body is characterized by surrounding the core metal and the closing member.
  • the outer surface of the core metal and the outer surface of the closing member are continuous, and the outer surface is formed of a convexly curved curve or a convexly curved curve and a straight line. .
  • the cored bar is U-shaped in the cross section.
  • the closure member fills the entire recess.
  • a space is present between the closing member and the deep portion of the recess.
  • the resin molded body is integrally molded with the core metal.
  • the closing member is made of resin, and the closing member and the resin molded body are made of the same resin material.
  • the closing member and the resin molded body are made of different materials.
  • the closing member is provided on the 6 o'clock side or the 12 o'clock side of the wheel portion.
  • the method of manufacturing a steering wheel according to the present invention is a method of manufacturing a steering wheel having a wheel portion, and the wheel portion has a core metal and a resin molded body surrounding the core metal, and the core metal is In a method of manufacturing a steering wheel having a non-circular cross-sectional shape having a recess in a cross section perpendicular to the circumferential direction of the wheel portion, the step of closing the recess of the core with a closing member, the core and the closing member And injection molding of a resin around the periphery of the resin to form the resin molded body.
  • the closing member is a preformed molded article, and in the closing step, the closing member is attached to the core metal.
  • the closing member is integrally molded with the core metal by injection molding.
  • the thickness of the resin molded body is equalized, and the residual stress of the resin molded body is equalized.
  • the sink marks and cracks of the resin molded body are prevented (including suppression), and the appearance of the steering wheel is improved.
  • FIG. 2 is a cross-sectional view taken along line II-II of FIG. 3a and 3b are cross-sectional views illustrating a method of manufacturing a steering wheel. It is a sectional view explaining a manufacturing method of a steering wheel. It is a sectional view explaining a manufacturing method of a steering wheel.
  • FIG. 1 is a front view of a steering wheel 1 according to the embodiment.
  • the steering wheel 1 has a boss 2, a spoke 3 and a wheel 4.
  • An air bag device 5 for the driver's seat is installed in the boss portion 2.
  • the wheel 4 is connected to the boss 2 via the spokes 3.
  • the wheel portion 4 is in the form of an annular ring located equidistantly from the boss portion 2.
  • FIG. 2 shows a cross section taken along line II-II of FIG. 1, that is, a cross section perpendicular to the circumferential direction of the wheel portion 4.
  • the wheel portion 4 includes an annular cored bar 10 which is located equidistantly from the boss portion 2, a closing member 20 engaged with the cored bar 10, the cored bar 10 and the closing member 20. And a decorative layer 40 provided on the outer periphery of the resin molded body 30.
  • the cored bar 10 is connected to a boss cored bar (not shown) via a spoke cored bar (not shown) to constitute a cored bar assembly.
  • the cored bar assembly is made of a light alloy such as, but not limited to, an aluminum alloy or a magnesium alloy.
  • FIG. 3 a shows a cross section of the core metal 10 along the line II-II.
  • the cored bar 10 has a cross section perpendicular to the winding direction of the wheel portion 4 and has a shape of a pair of leg pieces 11, 11 and one end sides of the leg pieces 11, 11.
  • a connecting piece 12 for connecting the A portion surrounded by the pair of leg pieces 11 and 11 and the connecting piece 12 is a recess 13.
  • the outer surface of the metal core 10 (the surface other than the recess 13 and the tip end surfaces of the leg portions 11 and 11) has a smooth U-shape.
  • a closing member 20 is provided to close the recess 13 as shown in FIG. 3b.
  • the closing member 20 may be made of a pre-formed resin molded body, and is formed so as to be integrated with the core metal 10 by injection molding prior to the formation of the resin molded body 30 described next. It may be
  • the closing member 20 may be in the shape of a ring that goes around the wheel portion 4 along the core metal 10, or may be in the shape of a circular arc extending in the circumferential direction.
  • the closing member 20 has an insertion portion 21 which is inserted into the recess 13 and a protrusion 22 which protrudes from the recess 13.
  • the projecting portion 22 is provided with a pair of overhanging portions 23, 23 which cover the end faces of the leg portions 11, 11.
  • the outer surfaces of the core metal 10 and the closing member 20 are formed of smooth convex curves or convex curves.
  • the cored bar provided with the closing member 20 in the recess 13 of the cored bar 10 as described above is disposed in a mold for molding the resin molded body 30, and the resin is injected to mold the resin molded body 30.
  • This injection molding may be RIM (reaction injection molding).
  • the decorative layer 40 is formed on the outer periphery of the resin molded body 30.
  • the decorative layer 40 has a lowermost primer layer, a printing layer such as wood grain on the primer layer, and a gloss layer covering the printing layer.
  • the decorative layer 40 can be formed by various methods such as hydraulic transfer.
  • the thickness of the resin molding 30 surrounding the core metal 10 and the closing member 20 is a cross section perpendicular to the circumferential direction of the wheel portion 4 (II- In the section II), the entire circumference is substantially uniform. Therefore, it is prevented that a sinking and a crack arise in the resin molding 30, and the external appearance of the wheel part 4 becomes favorable. In this manufacturing method, it is not necessary to quench or anneal the injection molded body.
  • the closing member 20 and the resin molding 30 various things, such as a polypropylene and ABS, can be used. By forming the closing member 20 and the resin molded body 30 with the same material, the adhesion strength of both can be increased.
  • the closing member 20 and the resin molded body 30 may be made of different materials.
  • the insertion portion 21 of the closing member 20 reaches the deepest portion of the concave portion 13, but in the present invention, as shown in FIG. 4, between the insertion portion 21 and the deepest portion of the concave portion 13 There may be a space S in In this way, the wheel portion 4 is reduced in weight.
  • the outer surface of the overhanging portion 23 and the outer surface of the leg portion 11 are continuous without a gap, but as shown in FIG. 5, the tip end surface of the leg portion 11 and the overhanging portion There is no problem even if there is some clearance C on the outer surface side of the butt portion with the portion 23.
  • the core metal 10 has a U-shaped cross-sectional shape, but may have a non-circular cross-sectional shape such as a semi-circular arc cross-sectional shape or a semi-elliptic arc cross-sectional shape.
  • the closing member 20 may be provided around the entire circumference of the wheel portion 4 and may be provided in an arc shape. As an example of the latter, a closing member 20 may be provided on the 12 o'clock side (for example, between 11 o'clock and 2 o'clock) or 6 o'clock side (for example, between 5 o'clock and 7 o'clock) in FIG.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Steering Controls (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

Provided are a steering wheel having an attractive appearance and a manufacturing method for the same. A wheel portion 4 has: an annular core metal 10 disposed around a boss portion 2 so as to have an equal radius therebetween; a closing member 20 engaged with the core metal 10; a resin molded body 30 surrounding the core metal 10 and closing member 20; and a decorative layer 40 disposed on the outer periphery of the resin molded body 30. The metal core 10 is U-shaped in cross-section thereof and has a pair of leg pieces 11, 11 and a connecting piece 12 for connecting one end sides of the leg pieces 11, 11. After closing a recess 13 with the closing member 20, injection molding is performed to form the resin molded body 30.

Description

ステアリングホイール及びその製造方法Steering wheel and method of manufacturing the same

　本発明は自動車などのステアリングホイールと、その製造方法に関する。詳しくは、芯金と、該芯金を取り巻く樹脂成形体とを有するステアリングホイールに関する。 The present invention relates to a steering wheel of a car and the like, and a method of manufacturing the same. In particular, the present invention relates to a steering wheel having a cored bar and a resin molded body surrounding the cored bar.

　芯金の周囲に樹脂を射出成形する工程を有するステアリングホイールの製造方法が特許文献１，２に記載されている。特許文献１では芯金は鋼管等の円形パイプよりなる。特許文献２では、芯金はアルミ合金、マグネシウム合金等の軽合金よりなり、Ｕ字形断面形状を有している。 Patent Literatures 1 and 2 disclose a method of manufacturing a steering wheel having a step of injection-molding a resin around a core metal. In Patent Document 1, the core metal is a circular pipe such as a steel pipe. In Patent Document 2, the metal core is made of a light alloy such as an aluminum alloy or a magnesium alloy and has a U-shaped cross-sectional shape.

特開平１１－９１５８８号公報Japanese Patent Application Laid-Open No. 11-91588 特開２０００－１９０８５１号公報JP 2000-190851 A

　芯金の外周に樹脂を射出成形した場合、樹脂が硬化する際に収縮応力が生じる。特許文献１のように芯金が円形パイプよりなる場合、収縮応力は等方的であり、樹脂成形体にヒケ等は生じにくい。ところが、特許文献２のように芯金がＵ字形である場合、Ｕ字の奥底と樹脂成形体外表面とを結ぶ方向の樹脂厚みが他方向の厚みよりも大きいため、この方向に大きな収縮応力が生じ、樹脂成形体にヒケや亀裂が発生し、ステアリングホイール製品の外観品質を低下させるおそれがある。かかるヒケ等の発生を防止するために、射出成形品をアニール処理したり急冷処理したりすることがあるが、常に十分な効果が得られるとは限らない。また、このような処理は手間がかかり、コストアップを招来する。 When a resin is injection-molded on the outer periphery of the cored bar, shrinkage stress occurs when the resin is cured. In the case where the cored bar is a circular pipe as in Patent Document 1, the contraction stress is isotropic, and it is difficult to cause a sink mark or the like in the resin molded body. However, when the cored bar is U-shaped as in Patent Document 2, the resin thickness in the direction connecting the deep end of the U-shape and the outer surface of the resin molded body is larger than the thickness in the other direction. As a result, sinking or cracking may occur in the molded resin, which may deteriorate the appearance quality of the steering wheel product. In order to prevent the occurrence of such sink marks and the like, the injection molded product may be subjected to annealing treatment or quenching treatment, but sufficient effects may not always be obtained. In addition, such processing is time-consuming and leads to an increase in cost.

　本発明は、外観が良好なステアリングホイール及びその製造方法を提供することを目的とする。 An object of the present invention is to provide a steering wheel having a good appearance and a method of manufacturing the same.

　本発明のステアリングホイールは、ホイール部を有するステアリングホイールであって、該ホイール部は、芯金と、該芯金を取り巻く樹脂成形体とを有し、該芯金は、該ホイール部の周方向と垂直な断面において凹部を有する非円形断面形状であるステアリングホイールにおいて、該凹部が閉鎖部材で閉鎖されており、前記樹脂成形体は該芯金及び閉鎖部材を取り巻いていることを特徴とする。 The steering wheel of the present invention is a steering wheel having a wheel portion, and the wheel portion has a core metal and a resin molded body surrounding the core metal, and the core metal is in the circumferential direction of the wheel portion. In the steering wheel having a non-circular cross-sectional shape having a recess in a cross section perpendicular to the surface, the recess is closed by a closing member, and the resin molded body is characterized by surrounding the core metal and the closing member.

　本発明の一態様では、前記断面において、前記芯金の外面と前記閉鎖部材の外面とは連続しており、これらの外面は、凸に湾曲した曲線又は凸に湾曲した曲線と直線とからなる。 In one aspect of the present invention, in the cross section, the outer surface of the core metal and the outer surface of the closing member are continuous, and the outer surface is formed of a convexly curved curve or a convexly curved curve and a straight line. .

　本発明の一態様では、前記芯金は前記断面における形状がＵ字形状である。 In one aspect of the present invention, the cored bar is U-shaped in the cross section.

　本発明の一態様では、前記閉鎖部材は前記凹部の全体を埋めている。 In one aspect of the invention, the closure member fills the entire recess.

　本発明の一態様では、前記閉鎖部材と前記凹部の奥部分との間に空間部が存在する。 In one aspect of the present invention, a space is present between the closing member and the deep portion of the recess.

　本発明の一態様では、前記樹脂成形体は前記芯金と一体に成形されたものである。 In one aspect of the present invention, the resin molded body is integrally molded with the core metal.

　本発明の一態様では、前記閉鎖部材は樹脂製であり、該閉鎖部材と前記樹脂成形体とが同一樹脂材料よりなる。 In one aspect of the present invention, the closing member is made of resin, and the closing member and the resin molded body are made of the same resin material.

　本発明の一態様では、前記閉鎖部材と前記樹脂成形体とは異なる材料からなる。 In one aspect of the present invention, the closing member and the resin molded body are made of different materials.

　本発明の一態様では、前記閉鎖部材は、前記ホイール部の６時側又は１２時側に設けられている。 In one aspect of the present invention, the closing member is provided on the 6 o'clock side or the 12 o'clock side of the wheel portion.

　本発明のステアリングホイールの製造方法は、ホイール部を有するステアリングホイールの製造方法であって、該ホイール部は、芯金と、該芯金を取り巻く樹脂成形体とを有し、該芯金は、該ホイール部の周方向と垂直な断面において凹部を有する非円形断面形状であるステアリングホイールを製造する方法において、前記芯金の前記凹部を閉鎖部材で閉鎖する閉鎖工程と、該芯金及び閉鎖部材の周囲に樹脂を射出成形して前記樹脂成形体を成形する工程とを有する。 The method of manufacturing a steering wheel according to the present invention is a method of manufacturing a steering wheel having a wheel portion, and the wheel portion has a core metal and a resin molded body surrounding the core metal, and the core metal is In a method of manufacturing a steering wheel having a non-circular cross-sectional shape having a recess in a cross section perpendicular to the circumferential direction of the wheel portion, the step of closing the recess of the core with a closing member, the core and the closing member And injection molding of a resin around the periphery of the resin to form the resin molded body.

　本発明の製造方法の一態様では、前記閉鎖部材は予め成形された成形品であり、前記閉鎖工程では該閉鎖部材を前記芯金に装着する。 In one aspect of the manufacturing method of the present invention, the closing member is a preformed molded article, and in the closing step, the closing member is attached to the core metal.

　本発明の製造方法の一態様では、前記閉鎖部材を射出成形により前記芯金と一体に成形する。 In one aspect of the manufacturing method of the present invention, the closing member is integrally molded with the core metal by injection molding.

　本発明のステアリングホイール及びその製造方法では、芯金の凹部を閉鎖部材で閉鎖するため、樹脂成形体の厚みが均等化され、樹脂成形体の残留応力が均等化される。これにより、樹脂成形体のヒケや亀裂が防止（抑制を包含する。）され、ステアリングホイールの外観が良好となる。 In the steering wheel and the method of manufacturing the same according to the present invention, since the recess of the core metal is closed by the closing member, the thickness of the resin molded body is equalized, and the residual stress of the resin molded body is equalized. Thereby, the sink marks and cracks of the resin molded body are prevented (including suppression), and the appearance of the steering wheel is improved.

実施の形態に係るステアリングホイールの正面図である。It is a front view of a steering wheel concerning an embodiment. 図１のII－II線断面図である。FIG. 2 is a cross-sectional view taken along line II-II of FIG. 図３ａ，３ｂはステアリングホイールの製造方法を説明する断面図である。3a and 3b are cross-sectional views illustrating a method of manufacturing a steering wheel. ステアリングホイールの製造方法を説明する断面図である。It is a sectional view explaining a manufacturing method of a steering wheel. ステアリングホイールの製造方法を説明する断面図である。It is a sectional view explaining a manufacturing method of a steering wheel.

　以下、図面を参照して実施の形態について説明する。 Hereinafter, embodiments will be described with reference to the drawings.

　図１は実施の形態に係るステアリングホイール１の正面図である。このステアリングホイール１は、ボス部２と、スポーク部３と、ホイール部４とを有する。ボス部２には運転席用エアバッグ装置５が設置されている。 FIG. 1 is a front view of a steering wheel 1 according to the embodiment. The steering wheel 1 has a boss 2, a spoke 3 and a wheel 4. An air bag device 5 for the driver's seat is installed in the boss portion 2.

　ホイール部４はスポーク部３を介してボス部２に連なっている。ホイール部４はボス部２から等半径位に位置して周回する環状である。 The wheel 4 is connected to the boss 2 via the spokes 3. The wheel portion 4 is in the form of an annular ring located equidistantly from the boss portion 2.

　図２は、図１のII－II線断面すなわちホイール部４の周回方向と垂直な断面を表わしている。図２の通り、このホイール部４は、ボス部２から等半径位に位置して周回する環状の芯金１０と、芯金１０に係合した閉鎖部材２０と、芯金１０及び閉鎖部材２０を取り巻く樹脂成形体３０と、樹脂成形体３０の外周に設けられた装飾層４０とを有する。芯金１０は、スポーク部芯金（図示略）を介してボス部芯金（図示略）に連なって芯金アッセンブリを構成している。この芯金アッセンブリはアルミ合金又はマグネシウム合金などの軽合金製とされるが、これに限定されない。 FIG. 2 shows a cross section taken along line II-II of FIG. 1, that is, a cross section perpendicular to the circumferential direction of the wheel portion 4. As shown in FIG. 2, the wheel portion 4 includes an annular cored bar 10 which is located equidistantly from the boss portion 2, a closing member 20 engaged with the cored bar 10, the cored bar 10 and the closing member 20. And a decorative layer 40 provided on the outer periphery of the resin molded body 30. The cored bar 10 is connected to a boss cored bar (not shown) via a spoke cored bar (not shown) to constitute a cored bar assembly. The cored bar assembly is made of a light alloy such as, but not limited to, an aluminum alloy or a magnesium alloy.

　図３ａは、芯金１０のII－II線に沿う断面を示している。この実施の形態にあっては、芯金１０は、ホイール部４の周回方向と垂直な断面の形状が、１対の脚片部１１，１１と、該脚片部１１，１１の一端辺同士を結ぶ連結片部１２とを有したＵ字形断面形状である。１対の脚片部１１，１１と連結片部１２とで囲まれた部分が凹部１３となっている。芯金１０の外面（凹部１３及び脚片部１１，１１の先端面以外の面）は、滑らかなＵ字形状である。 FIG. 3 a shows a cross section of the core metal 10 along the line II-II. In this embodiment, the cored bar 10 has a cross section perpendicular to the winding direction of the wheel portion 4 and has a shape of a pair of leg pieces 11, 11 and one end sides of the leg pieces 11, 11. And a connecting piece 12 for connecting the A portion surrounded by the pair of leg pieces 11 and 11 and the connecting piece 12 is a recess 13. The outer surface of the metal core 10 (the surface other than the recess 13 and the tip end surfaces of the leg portions 11 and 11) has a smooth U-shape.

　ステアリングホイール１を製造するには、図３ｂの通り、凹部１３を閉鎖するように閉鎖部材２０を設ける。この閉鎖部材２０は、予め成形された樹脂成形体よりなるものであってもよく、次に述べる樹脂成形体３０の成形に先立って射出成形により芯金１０と一体化するように成形されたものであってもよい。 In order to manufacture the steering wheel 1, a closing member 20 is provided to close the recess 13 as shown in FIG. 3b. The closing member 20 may be made of a pre-formed resin molded body, and is formed so as to be integrated with the core metal 10 by injection molding prior to the formation of the resin molded body 30 described next. It may be

　この閉鎖部材２０は、芯金１０に沿ってホイール部４を周回する環状であってもよく、周方向に延びる円弧状であってもよい。閉鎖部材２０は凹部１３へ挿入される挿入部２１と、凹部１３から突出する突出部２２とを有する。突出部２２には、脚片部１１，１１の端面に被さる１対の張出部２３，２３が設けられている。ホイール部４の周回方向と垂直な断面（II－II断面）において、芯金１０及び閉鎖部材２０の外面は滑らかな凸の曲線、又は凸の曲線と直線からなる。 The closing member 20 may be in the shape of a ring that goes around the wheel portion 4 along the core metal 10, or may be in the shape of a circular arc extending in the circumferential direction. The closing member 20 has an insertion portion 21 which is inserted into the recess 13 and a protrusion 22 which protrudes from the recess 13. The projecting portion 22 is provided with a pair of overhanging portions 23, 23 which cover the end faces of the leg portions 11, 11. In a cross section (II-II cross section) perpendicular to the circumferential direction of the wheel portion 4, the outer surfaces of the core metal 10 and the closing member 20 are formed of smooth convex curves or convex curves.

　このように閉鎖部材２０を芯金１０の凹部１３に設けてなる芯金を、樹脂成形体３０成形用の金型内に配置し、樹脂を射出して樹脂成形体３０を成形する。この射出成形はＲＩＭ（反応射出成形）であってもよい。 The cored bar provided with the closing member 20 in the recess 13 of the cored bar 10 as described above is disposed in a mold for molding the resin molded body 30, and the resin is injected to mold the resin molded body 30. This injection molding may be RIM (reaction injection molding).

　樹脂が硬化した後、脱型する。その後、樹脂成形体３０の外周に装飾層４０を形成する。装飾層４０は例えば、最下層のプライマー層と、プライマー層上の木目模様等の印刷層と、印刷層を覆う光沢層とを有したものとされる。この装飾層４０は、水圧転写等の各種の方法によって形成することができる。 After the resin cures, it is demolded. Thereafter, the decorative layer 40 is formed on the outer periphery of the resin molded body 30. For example, the decorative layer 40 has a lowermost primer layer, a printing layer such as wood grain on the primer layer, and a gloss layer covering the printing layer. The decorative layer 40 can be formed by various methods such as hydraulic transfer.

　このように構成されたステアリングホイール１のホイール部４は、芯金１０及び閉鎖部材２０を取り巻く樹脂成形体３０の厚みが、図２の通り、ホイール部４の周回方向と垂直な断面（II－II断面）において全周にわたって略均一である。そのため、樹脂成形体３０にヒケや亀裂が生じることが防止され、ホイール部４の外観が良好となる。この製造方法では、射出成形体を急冷したりアニール処理したりすることが不要である。 In the wheel portion 4 of the steering wheel 1 configured in this manner, as shown in FIG. 2, the thickness of the resin molding 30 surrounding the core metal 10 and the closing member 20 is a cross section perpendicular to the circumferential direction of the wheel portion 4 (II- In the section II), the entire circumference is substantially uniform. Therefore, it is prevented that a sinking and a crack arise in the resin molding 30, and the external appearance of the wheel part 4 becomes favorable. In this manufacturing method, it is not necessary to quench or anneal the injection molded body.

　なお、閉鎖部材２０及び樹脂成形体３０の樹脂材料としては、ポリプロピレン、ＡＢＳなど各種のものを用いることができる。閉鎖部材２０と樹脂成形体３０を同一材料で構成することにより、両者の付着強度を大きくすることができる。閉鎖部材２０と樹脂成形体３０とを異なる材料で構成してもよい。 In addition, as a resin material of the closing member 20 and the resin molding 30, various things, such as a polypropylene and ABS, can be used. By forming the closing member 20 and the resin molded body 30 with the same material, the adhesion strength of both can be increased. The closing member 20 and the resin molded body 30 may be made of different materials.

　上記実施の形態では、閉鎖部材２０の挿入部２１は、凹部１３の奥底にまで到達するものとなっているが、本発明では図４のように、挿入部２１と凹部１３の奥底との間に空間部Ｓが存在してもよい。このようにすると、ホイール部４が軽量化される。 In the above embodiment, the insertion portion 21 of the closing member 20 reaches the deepest portion of the concave portion 13, but in the present invention, as shown in FIG. 4, between the insertion portion 21 and the deepest portion of the concave portion 13 There may be a space S in In this way, the wheel portion 4 is reduced in weight.

　また、上記実施の形態では、張出部２３の外面と脚片部１１の外面とが隙間なく連続したものとなっているが、図５のように、脚片部１１の先端面と張出部２３との突き合わせ部分の外面側に若干のクリアランスＣが存在しても問題はない。 In the above embodiment, the outer surface of the overhanging portion 23 and the outer surface of the leg portion 11 are continuous without a gap, but as shown in FIG. 5, the tip end surface of the leg portion 11 and the overhanging portion There is no problem even if there is some clearance C on the outer surface side of the butt portion with the portion 23.

　上記実施の形態では芯金１０はＵ字形断面形状とされているが、半円弧形断面形状や半楕円弧形断面形状などの非円形断面形状とされてもよい。 In the above embodiment, the core metal 10 has a U-shaped cross-sectional shape, but may have a non-circular cross-sectional shape such as a semi-circular arc cross-sectional shape or a semi-elliptic arc cross-sectional shape.

　前述の通り、閉鎖部材２０はホイール部４の全周にわたって設けられてもよく、円弧状に設けられてもよい。後者の一例として、図１の１２時側（例えば１１時～２時の間）又は６時側（例えば５時～７時の間）に閉鎖部材２０が設けられてもよい。 As mentioned above, the closing member 20 may be provided around the entire circumference of the wheel portion 4 and may be provided in an arc shape. As an example of the latter, a closing member 20 may be provided on the 12 o'clock side (for example, between 11 o'clock and 2 o'clock) or 6 o'clock side (for example, between 5 o'clock and 7 o'clock) in FIG.

　上記実施の形態は本発明の一例であり、本発明は上記以外の各種形態をとることができる。 The above embodiment is an example of the present invention, and the present invention can take various forms other than the above.

　本発明を特定の態様を用いて詳細に説明したが、本発明の意図と範囲を離れることなく様々な変更が可能であることは当業者に明らかである。
　本出願は、２０１７年８月７日付で出願された日本特許出願２０１７－１５２５７５に基づいており、その全体が引用により援用される。 Although the invention has been described in detail with particular embodiments, it will be apparent to those skilled in the art that various modifications can be made without departing from the spirit and scope of the invention.
This application is based on Japanese Patent Application 2017-152575 filed on Aug. 7, 2017, which is incorporated by reference in its entirety.

　１　ステアリングホイール
　２　ボス部
　３　スポーク部
　４　ホイール部
　１０　芯金
　２０　閉鎖部材
　３０　樹脂成形体
　４０　装飾層 1 steering wheel 2 boss portion 3 spoke portion 4 wheel portion 10 cored bar 20 closing member 30 resin molded body 40 decorative layer

Claims (12)

　ホイール部を有するステアリングホイールであって、
　該ホイール部は、芯金と、該芯金を取り巻く樹脂成形体とを有し、
　該芯金は、該ホイール部の周方向と垂直な断面において凹部を有する非円形断面形状であるステアリングホイールにおいて、
　該凹部が閉鎖部材で閉鎖されており、
　前記樹脂成形体は該芯金及び閉鎖部材を取り巻いていることを特徴とするステアリングホイール。 A steering wheel having a wheel portion,
The wheel portion includes a cored bar and a resin molded body surrounding the cored bar,
In the steering wheel, the cored bar is a non-circular cross-sectional shape having a recess in a cross section perpendicular to the circumferential direction of the wheel portion,
The recess is closed by a closing member;
A steering wheel characterized in that the resin molded body surrounds the core metal and the closing member. 　請求項１において、前記断面において、前記芯金の外面と前記閉鎖部材の外面とは連続しており、これらの外面は、凸に湾曲した曲線又は凸に湾曲した曲線と直線とからなることを特徴とするステアリングホイール。 In Claim 1, in the cross section, the outer surface of the core metal and the outer surface of the closing member are continuous, and the outer surface is composed of a convexly curved curve or a convexly curved curve and a straight line. Characteristic steering wheel. 　請求項１又は２において、前記芯金は前記断面における形状がＵ字形状であることを特徴とするステアリングホイール。 The steering wheel according to claim 1, wherein a shape of the core in the cross section is a U-shape. 　請求項１ないし３のいずれか１項において、前記閉鎖部材は前記凹部の全体を埋めていることを特徴とするステアリングホイール。 The steering wheel according to any one of claims 1 to 3, wherein the closing member fills the entire recess. 　請求項１ないし３のいずれか１項において、前記閉鎖部材と前記凹部の奥部分との間に空間部が存在することを特徴とするステアリングホイール。 The steering wheel according to any one of claims 1 to 3, wherein a space is present between the closing member and the rear portion of the recess. 　請求項１ないし５のいずれか１項において、前記樹脂成形体は前記芯金と一体に成形されたものであることを特徴とするステアリングホイール。 The steering wheel according to any one of claims 1 to 5, wherein the resin molded body is integrally formed with the core metal. 　請求項１ないし６のいずれか１項において、前記閉鎖部材は樹脂製であり、該閉鎖部材と前記樹脂成形体とが同一樹脂材料よりなることを特徴とするステアリングホイール。 The steering wheel according to any one of claims 1 to 6, wherein the closing member is made of resin, and the closing member and the resin molded body are made of the same resin material. 　請求項１ないし６のいずれか１項において、前記閉鎖部材と前記樹脂成形体とは異なる材料からなることを特徴とするステアリングホイール。 The steering wheel according to any one of claims 1 to 6, wherein the closing member and the resin molded body are made of different materials. 　請求項１ないし８のいずれか１項において、前記閉鎖部材は、前記ホイール部の６時側又は１２時側に設けられていることを特徴とするステアリングホイール。 The steering wheel according to any one of claims 1 to 8, wherein the closing member is provided on the 6 o'clock side or the 12 o'clock side of the wheel portion. 　ホイール部を有するステアリングホイールの製造方法であって、
　該ホイール部は、芯金と、該芯金を取り巻く樹脂成形体とを有し、
　該芯金は、該ホイール部の周方向と垂直な断面において凹部を有する非円形断面形状であるステアリングホイールを製造する方法において、
　前記芯金の前記凹部を閉鎖部材で閉鎖する閉鎖工程と、
　該芯金及び閉鎖部材の周囲に樹脂を射出成形して前記樹脂成形体を成形する工程と
を有するステアリングホイールの製造方法。 A method of manufacturing a steering wheel having a wheel portion, comprising:
The wheel portion includes a cored bar and a resin molded body surrounding the cored bar,
In the method of manufacturing a steering wheel, the cored bar has a non-circular cross-sectional shape having a recess in a cross section perpendicular to the circumferential direction of the wheel portion,
Closing the recess of the core with a closing member;
And a step of injection-molding a resin around the core metal and the closing member to form the resin molded body. 　請求項１０において、前記閉鎖部材は予め成形された成形品であり、前記閉鎖工程では該閉鎖部材を前記芯金に装着することを特徴とするステアリングホイールの製造方法。 The method of manufacturing a steering wheel according to claim 10, wherein the closing member is a preformed molded article, and in the closing step, the closing member is attached to the core metal. 　請求項１０において、前記閉鎖部材を射出成形により前記芯金と一体に成形することを特徴とするステアリングホイールの製造方法。 The method according to claim 10, wherein the closing member is formed integrally with the core metal by injection molding.
PCT/JP2018/025868 2017-08-07 2018-07-09 Steering wheel and manufacturing method therefor Ceased WO2019031132A1 (en)

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WO2020175326A1 (en) 2019-02-25 2020-09-03 パウダーテック株式会社 Ferrite particles, electrophotographic developer carrier core material, electrophotographic developer carrier, and electrophotographic developer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0976921A (en) * 1995-09-11 1997-03-25 Tokai Rika Co Ltd Steering wheel device
JPH11124043A (en) * 1997-10-24 1999-05-11 Toyoda Gosei Co Ltd Steering wheel
JP2015067017A (en) * 2013-09-27 2015-04-13 豊田合成株式会社 Heater element for steering wheel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0976921A (en) * 1995-09-11 1997-03-25 Tokai Rika Co Ltd Steering wheel device
JPH11124043A (en) * 1997-10-24 1999-05-11 Toyoda Gosei Co Ltd Steering wheel
JP2015067017A (en) * 2013-09-27 2015-04-13 豊田合成株式会社 Heater element for steering wheel

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